Yarn shed testing machine



June 5, 1951 R. J. TAYLOR ETAL YARN smzn TESTING MACHINE Filed Jan. 24, 1947 2 Sheets-Sheet 1 INVENTOR. loberf J. Taylor By Robarf C. Johnsan jaw lfforncu 2 Sheets-Sheet 2 u INVENTOR.

Baker) C. Johnson /m Afforney June 5, 1951 R J TAYLOR ETAL YARN SHED TESTING MACHINE Filed Jan. 24, 1947 BY :1. i

Patented June 5, 1951 YARN SHED TESTIN G MACHINE Robert J. Taylor and Robert C. Johnson, Bir mingham, Ala., assignors, by mesne assignments, to SouthernResearch Institute, Birmingham, Ala., a. corporation of Alabama Application January 24, 1947, Serial No. 724,012

6 Claims.

-This invention relates to a yarn testing machine and has for an object the provision of apparatusof the character designated which shall be simple of design and operation and which shall be adapted to determine accurately the weaving quality of a yarn, its resistance to abrasion and its resistance to impact comparable to that to'which it is subjected in a loom.

A further object of our invention is to provide a yarn'testing machine which shall be adapted to determine selectively the resistance of the yarn to abrasion and to impact comparable to that to which it is subjected in a loom.

Briefly, our improved apparatus comprises mechanism which simulates the motions of a loom, without the complications of a loom, and provides means for collecting the fiber and other loom shed abraded from the yarn.

Apparatus embodying features of our invention is illustrated in the accompanying drawing forming'a part of this application, in which Fig. il is a plan View with certain parts partly broken away;

Fig. 2 is a side elevation; 7

- Fig. 3 is a detail sectional view taken along the line IIIIII of Fig. 2, and

, Fig. "4 is a detail sectional view of the reed carriage. 7

(Referring to the drawings for a better understanding of our invention, our improved machine is mounted on four upright members In, H, l2, and 3 mounted on a base or floor member I4 and extending upwardly therefrom. The uprights are joined at the ends by cross members l6 and I1. Horizontally extending side frame members I8 and Hi extend rearwardly from the front of the machine to a point approximately midway the ends thereof where they are joined to depending vertical members 2| only one being shown. Other horizontal side frame members 22 and 23 are joined to the top of the members 2| and extend rearwardly therefrom to be joined to the upper ends of the vertical members I2 and 13.

At 24 we show a roller upon which the ends of yarn to be tested are wound, the roller 24 having a shaft 26, mounted in bearings 21 and 28, on the end frame'members l and II. A drum 29 is mounted on the end of the shaft 26 and a cable 3| is wound around the drum with one end secured thereto. The other end of the cable extends over a pulley 32, mounted on an upwardly projectin bracket 33 and has a weight 34 connected to its lower end for applying a predetermined tension on the yarn. At the opposite, or rear end, of the machine is mounted a take up r011 36 having a shaft 31, mounted in bearings 38 and 39, on the uprights l2 and Hi. On one end of the shaft 31 is a worm gear 4| which is driven by a small, variable speed electric motor 42 having a worm 43 on the end of its shaft which meshes with the worm gear 4|. 7

At 44 and 46 we show harness bearing the usual heddles and disposed on opposite sides of the depending upright frame members 2 l. The lower ends of the harness-44 and 4B are connected by means of a coil spring 41 which passes over a grooved roller 48 mounted on thelower'end of the upright frame member 2|. The upper ends of the harness 44 and 46 are supported respectively 'by treadles 49 and 5| having their forward ends pivotally connected to the upper cross frame member H5 at 52 and 53. The rearward ends of the treadles 49 and 5| are connected to the top of the harness at 54 and 56 by means 'of' rods 54 and 5t carried in brackets-at the top of the harness. Mounted on the t1eadles 49 and 5| are grooved follower rollers 51 and 58, which bear respectively on eccentrics -59 and BI, mounted on a cross shaft 62 having a drive sprocket 66 on one end thereof. The shaft 62 is mounted in bearings 63 and 64 on the forwardly extending side frame members I8 and I9:

At El and 68 we show, track members having upper convexlycurved surfaces, which track members incline downwardly from the rear forwardly and which have their endsjsecured to the vertical members 2| and to the end members |2 and I3. Mounted above the tracks- 51 and 68 and midway said tracks is asingle rail 65 having its under surface concavely Clll'VBd in parallelism with the upper convexly curved-surfaces of the tracks Bland 68. Mounted on the tracks 5'! and 68 is a carriage comprised of L-shaped members 69 connected by cross rods H and 12 with rollers 13 and 14 on each side (only one sidebeing shown) and which ride on the track members '61 and B8. In order to hold the carriage in place when subjected to the shocks of operation, we also provide flanged rollers 15 and on the rods II and 12 which bear against the under side of the rail 65. Detachably mounted on the lower arms 11 of the carriage is a reed 18. The cross shaft 12 of the carriage is connected at its ends by links 19 and 8| to crank arms 82 and 82 mounted on a shaft 83 extending across and journalled in the frame. A sprocket B5 is mounted on the shaft adjacent the crank arm 82.

Depending from the tracks 61 and and directly behind the lower arms 11 of the carriage 69 are two links 94 (only one being shown) which are pivoted at 96 to swing freely from the tracks. The two links are connected by means of a cross rod9l. Threaded studs98 are carried by the lower arms ll of the carriage in position to strike the links 94 upon backward movement of the carriage as hereinafter described. Mounted on the rear vertical members l2 and is are a pair of stationary brackets 99, only one of which is -stant tension thereto. through the heddles in the harness 44 and 46 and under the rod [III to the takeup roll 36.

shown, and which are connected by a cross rod IOI which is disposed, as shown in Fig. 2 of the drawing; below the cross rod 91.

The harness 44 and 46 and the carriage carrying the reed 18, are driven by means of a variable speed motor I02 having a sprocket I03 on its drive shaft. A sprocket chain I04 passes from the sprocket I03 under the sprocket 85 and suitable number of ends, say .500, are wound on the roller 24 with the weight 34 supplying a con- The ends are passed as in a loom, to provide a shed. The shedding motioniis provided by the treadles 49 and 5| and cams 59 and BI raising and lowering the harness 44 and 46. The ends pass from the heddles through the reed I8 and thence over the rod 91 The takeuproll bein actuated by the variable speed ymotor 42 through the gearing described, draws the ends through the apparatus. The carriage "B9 is reciprocated back and forth on the tracks 6'] and 68 by means of the crank arms 82 and 83 and connecting links I9 and BI so that the yarn ist-subjected to further abrasion in the reed I8.

Each time the carriage 69 moves forward, the lower arm 11 moves away from the-depending arm 94 allowing the arm 94 to swing forwardly a small amount; Upon rearward motion of the carriage, the studs 98 strike the arm as, thereby subjecting the yard to shock and elongation strain, simulating the beating up action in a loom. The degree of impact thus imparted may be varied by adjusting the studs 98. This action will cause any weak ends to break, As the ends travel through the apparatus, it will thus be seen that it is subjected to abrasive action and shock which will disclose any weakness in the yarn, its weaving qualities, and resistance to abrasion. Our improved testing machine is thus important in determining the relative values of various sizing compounds. Any fiber .orf'other shed material abraded from the .yarnfalls into the pan I06 where it may be collectedand weighed.

If it be desired to determine the resistance to ,impactdnly .of the yarn, the harness 44 and 5B and reed 28 may be removed, in which case the yarn is passed from the roller 24 over the rod 97 and under the rod :IIJI, whereupon at each reciprocation of the carriage, the studs 98 strike the V11 ks 94 and the yarn is subjected to impact only. Also, by stopping the harnes motion and .remo ig the links .94, the resistance of the yarn to ab'ra on only may be determined. 1

- While we have shown our invention in formgit will be obvious to those skilled in the art that .it is not so limited, but that it is susceptible of various changes and modifications, without departing from the spirit thereof, and we desire, therefore, that only such limitations shall be placed thereupon as ,are specifically set .forth in the appended claims.

What we claim is: .1. In a aratus for testing yarn, means .ior

but one feeding a selected number of ends through the apparatus under tension, a swinging cross rod over which the ends pass, pivoted links in which the swinging cross rod is mounted, a stationary cross rod in the apparatus under which the ends pass, a reciprocatory carriage mounted in front of the pivoted links, and means On the carriage to strike the links at each reciprocation of the carriage.

2. In apparatus for testing yarn, means for feeding a selected number of ends through the apparatus under tension, heddles through which the ends pass, means to impart a shedding motion to the heddles, a reed carriage having a reed through which the ends pass, means to impart a reciprocatory and up and down motion to the reed carriage, means to collect lint and other material abraded from the ends in their passage through the apparatus, a swinging cross rod, pivoted links in which the swinging rod is mounted, a stationary cross rod beneath the swinging rod under which the ends pass, and means on the reed carriage to strike the links at each reciprocation thereof.

.3. In apparatussfor testing yarn, a supply roll on which a selected number of ends are wound, heddles through which the ends are passed, means to impart a shedding motion to the heddles, a reed through which the ends pass, a carriage on which the reed is mounted, means to impart a beating up motion to the carriage and reed, a swinging cross rod disposed at the rear of the reed over which the ends pass, pivoted links in which the swinging cross rod is mounted, a stationary cross rod beneath the swinging cross rod under which the ends pass, adjustable means .on the reed carriage to strike the pivoted links at each heating up motion, means to collect lint and other material abraded from the yarn, and a variable speed take up roll to draw the ends through the apparatus.

4. Apparatus as defined in claim 3 in which the means for imparting motion to the heddles and carriage are disposed above the ends in their passage through the apparatus and in which the means for collecting lint abraded from the yarn is a pan located directly under the ends in their passage through the apparatus.

5. Apparatus as defined in claim 3 in which the carriage is mounted for reciprocation by means .of rollers on convexly curved tracks.

on the carriage and bearing upwardly against a ooncavely curvedrail mounted above the convexly curved tracks.

ROBERT J. TAYLOR. ROBERT c. JOHNSON.

R F ENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

